/*
*******************************************************************************
* Copyright (c) 2021 by M5Stack
*                  Equipped with M5Core2 sample source code
*                          配套  M5Core2 示例源代码
* Visit the website for more information: https://docs.m5stack.com/en/core/core2
* 获取更多资料请访问: https://docs.m5stack.com/zh_CN/core/core2
*
* describe: Display Example.  显示屏示例
* date: 2021/7/21
*******************************************************************************
*/
#include <M5Core2.h>

/* After M5Core2 is started or reset
the program in the setUp () function will be run, and this part will only be run once.
在 M5Core2 启动或者复位后，即会开始执行setup()函数中的程序，该部分只会执行一次。 */
void setup() {
  M5.begin(); //Init M5Core2.  初始化 M5Core2
  M5.Lcd.fillScreen(WHITE); // Set the screen background.  设置屏幕底色为白色
  delay(500); //Delay 500ms.  延迟500ms
  M5.Lcd.fillScreen(RED);
  delay(500);
  M5.Lcd.fillScreen(GREEN);
  delay(500);
  M5.Lcd.fillScreen(BLUE);
  delay(500);
  M5.Lcd.fillScreen(BLACK);
  delay(500);

  M5.Lcd.setCursor(10, 10); //Move the cursor position to (x,y).  移动光标位置到 (x,y)处
  M5.Lcd.setTextColor(WHITE); //Set the font color to white.  设置字体颜色为白色
  M5.Lcd.setTextSize(1);  //Set the font size.  设置字体大小
  M5.Lcd.printf("Display Test!");  //Serial output format string.  输出格式化字符串

  // draw graphic
  delay(1000);
  M5.Lcd.drawRect(100, 100, 50, 50, BLUE);  //Draw a 50x50 blue rectangle wireframe at (x,y).
  delay(1000);                            //在（x,y）处画 长宽为50x50的蓝色矩形线框
  M5.Lcd.fillRect(100, 100, 50, 50, BLUE);//Draw a blue rectangle 50x50 at (x,y)
  delay(1000);                          //在（x,y）处画 长宽为50x50的蓝色矩形
  M5.Lcd.drawCircle(100, 100, 50, RED); //Draw a red circle of radius 50 at (x,y)
  delay(1000);                          //在（x,y）处画 半径为50的红色圆线圈
  M5.Lcd.fillCircle(100, 100, 50, RED); //Draw a red circle of radius 50 at (x,y)
  delay(1000);                          //在（x,y）处画 半径为50的红色圆
  M5.Lcd.drawTriangle(30, 30, 180, 100, 80, 150, YELLOW); //Make a triangle wireframe with (x1,y1) (x2,y2) (x3,y3) as the vertices
  delay(1000);                                           //以 (x1,y1) (x2,y2) (x3,y3)为顶点作三角形线框
  M5.Lcd.fillTriangle(30, 30, 180, 100, 80, 150, YELLOW);   //以 (x1,y1) (x2,y2) (x3,y3)为顶点作三角形
}                                                         // Construct a triangle with (x1,y1) (x2,y2) (x3,y3) as its vertices

/* After the program in setup() runs, it runs the program in loop()
The loop() function is an infinite loop in which the program runs repeatedly
在setup()函数中的程序执行完后，会接着执行loop()函数中的程序
loop()函数是一个死循环，其中的程序会不断的重复运行 */
void loop(){

  M5.Lcd.fillTriangle(random(M5.Lcd.width()-1), random(M5.Lcd.height()-1), random(M5.Lcd.width()-1), random(M5.Lcd.height()-1), random(M5.Lcd.width()-1), random(M5.Lcd.height()-1), random(0xfffe));

  M5.update();  //Read the press state of the key.  读取按键 A, B, C 的状态
}
